Improvement in book and music supports



L BERG. BOOKAND MUSIC SUPPOR'IK No.171,260; PatentdDec. 21, 1875;,

Liz-41 N-FETERS. PHOTO-IJTHOGRAPHER, WASHINGTON. D C.

U ITED STATEs PATENT OFFICE.

' LORENTZ BERG, on MINNEAPOLIS, MINNEsoTA.

IMPROVEMENT IN BOOKVAND MUSIC SUPPORTS.

Specification forming part of Letters Patent No. 171,260, dated December21, 1875; application filed J une 19, 1875.

To all whom it may concern:

Be it known that I, LORENTZ BERG, of Minneapolis, in the county ofHennepin and State of Minnesota, have invented certain new and usefulImprovements in Adjustable Book and Music Supports; and I do herebydeclare that the following is a full, clear, and exact descriptionthereof, which will enable others skilled in theart to which it pertainstomake and use the same, reference being had to the accompanyingdrawings, and to the letters of reference marked thereon which form apart of this specification, and in which- Figure l is a perspectiveview, and Fig. 2 is a side elevation of the book-holding frame. Similarletters of reference indicate correspondin g parts.

This invention relates tothat class of booksupports or music-holderswhere the bookholding frame may be adjusted so as to conform to. thesize of the book or sheet of music; and it consists in the constructionand arrangement of parts, substantially as hereinafter set forth. i

A is an upright standard, provided with one or more longitudinal slots,b. In the slot or slots .is inserted the sliding standard 0, which has aseries of perforations, c c c. Pivoted to the top of the standard 0isthe laterally-projecting revolving arm D, which carries the adjustableframe. This consists of four strips of wood or metal 0, e, e, and 6',each having two longitudinal slots, f. One of the strips, 6, is firmlysecured at right angles to the arm D the other, 6, parallel to this, hasa sliding box, (shown atgin Fig. 2.) The strips 6 and e are adjusted atright angles toeand c by means of loose sliding nuts H, which slide inthe slots f. iThe four strips thus form a parallelogram, the size ofwhich may be regulated at will to conform to the size of the book orsheet of music. The strips 6 and c are each provided with a clamp, I,adjustable by a set-screw, K, so as to firmly clamp the covers of thebook-one on each side. Each of them has also a small upright, L,carrying a bracket, M, and perforated at N.

To the brackets M are secured coiled springs O, terminating in loops oreyes 0. In the perforations N and eyes 0 are inserted the adjustablethumb-levers m, to the inner ends of which are affixed cross-wires m,which form the leaf-holders, that will press down upon and hold theleaves inserted under them by the tension of the springs O. The strips 0and c are each perforated at n, and in the perforation is inserted thehook 10, so as to clasp the back part of the binding of the bookinserted in the frame, and thus hold it secure ly in its properposition. The arm D is pivoted to the standard O in such a manner thatit can be made to revolve in its bearings. It is provided with aratchet-wheel, R, that engages With a spring-pawl, S, so that it may beadjusted to any desired angle. The elevation of the book-carrying framemay be regulated by the bent spring-lever T, which is pivoted to thestandard A, as shown. The bent part a of the lever T, engaging with theperforations 0 in the sliding standard 0, holds this firmly at anyheight to which it is adjusted.

Having thus described myinvention, Iclaim and desire to secure byLetters Patent of the United States- 1. In a book or music holder,device consisting of the upright L, having the perforation N, bracket M,and spring 0 7 the latter arranged so as to operate the clasp orthumblever m, substantially as and for the purpose hereinbet'oresetforth.

2. A book or music support consisting of the upright A, sliding standard0, revolving horizontal arm I). book-holding frame 6, e, e, and c,hooksp, clamps I, thumb-levers m, and

leaf-holders m, all constructed and arranged substantially as and forthe purpose hereinbefore set forth.

In testimony that I claim the foregoing as my own, I have hereuntoaffixed my signature in the presence of two witnesses.

LORENTZ BERG.

Witnesses:

JNo. W. ARGTANDER, ANDREAS UELAND.

a leaf-holding

